This is a Maxis Recolour which means that it is a recolour of an item that already exists in your game. Please check the Expansion pack requirements to see which game pack it recolours.

Originally, a female black ballcap from Open For Business EP (afHairHatBallCapUp_[...]_black and tfHairHatBallCapUp_[...]_black) has exactly the same texture as one of base game ballcaps. However, it's supposed to be plain black, just like the male version. This file fixes that mistake by changing texture references.